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March 22, 1932.- 1 SPALDlNG CONTROL FOR ROTARY DRAW WORKS Filed April 1, 1929 3 Sheets-sheet l March 22, 1932. .1. D. SPALDING CONTROL FOR ROTARY DRAW WORKS Filed April 1, 1929' 5 Sheets-Sheet March 22, 192.2. D, sPALDlNG 1,850,607

CONTROL FOR ROTARY DRAW WORKS Filed April 1, 1929 5 Sheets-Sheet 3 Punud'mr. 22,1932

UNITED STATES- PATENT OFFICE JOHN D. SYALDIKG, OF GRAFTON, PENNSYLVANIA, .A SSIGNOR TO THE NATIONAL sunny comm or DELAWARE, or

wean

Application filed April 1,

This invention relates to controls for rotary drawworks and, more especially, to the mounting for the brake operating mechanism, for the change-speed operating mech- Bf anism and for the rotary clutch operating mechanism.

Heretofore, it has been customary to install the brake operating mechanism and change-speed operating mechanism separate- 51y from the remainder of the drawworks upon the floor of the derrick. This entailed that the brake operating mechanism and change-speed operating'mechanism must be properly aligned with the instrumentalitles which they controlled and it also involved the separate installation of a great number of small parts that made up said mechanisms. Thus a considerable length of time was required in installing the drawworks. Fur- 39 thermore, after a well has been drilled, the drawworks are removed to another location for drilling another well, and, accordingly, it was necessary to disassemble the parts of the brake operating mechanism and change- 5 speed operating mechanism from the remainder of the drawworks and to then reassembie them in the new location. This all required a great deal of time and one of the important objects of this invention is to re-' 32 duce the time of installation and removal of the drawworks.

Also, it has been customary to provide for hand contgol of the rotary clutch operating mechanism. The rotary clutch, so termed, as is the clutch that connects the rotary table drive with the line shaft of the rotary drawworks for operation of said rotary table. Another object of this invention is to make provision for foot control of the rotary clutch operating mechanism and to provide for mounting of a portion of said mechanism, as well as the mechanismsthat operate the brakes and eifect change of speed, upon a 45 plate that is adapted to rest on the derrick floor and to be detachably secured to two of the posts of the drawworks, thus enabling all of these mechanisms to be quickly installed and connected up with the parts which they control.

NEW YORK, N. Y., A COBBORA'I'ION OF DELA- CONTROL FOR ROTARY DRAW WORKS 1929.. Serial No. 351,813.

Another object is simplicity of construction.

Further objects and advantages will ap pear in the subjoined detailed description. Theaccompanying drawings illustrate the invention:

Figure 1 is a front elevation of a rotary drawworks in which the invention is embodied, end portions of some of the longitudinal members of the frame being broken awa to contract the view.

Figure 2 is a plan view of the unit that embodies the brake operating mechanism and the change-speed operating mechanism, portions of the frame of the drawworks, to which said unit is secured, also being shown.

Figure 3 is an end elevation, partly in section, of Figure 2 from the left thereof.

Figure 4 is a plan view of the plate shown in Figure 2.

1 Figure 5 is an enlarged vertical section on the line indicated by 55, Figure 2.

Figure 6 is a detail view of the anchor connection of one of the cables with one of the plate extensions.

Figure 7 is a fragmental elevation of a rotary drawworks in which is embodied some of the parts of a slight modification of the invention,

Figure 8 is a plan view similar to Figure 2, showing the modified form of the invention of Figure 6, the shifting forks being in section.

Referring to Figs. 1 to 6 of the drawings, the frame of the drawworks is indicated in general by the character 7 and includes posts or standards 8, 9, 10 on which are mounted bearings 11 for a jack shaft 12 which is 1'0 vided with a sprocket 13 that is driven y a suitable prime mover. On the shaft 12 is another sprocket 14 that is connected by a sprocket chain 15 to asprocket 16 that may be connected by a clutch 17 with a shaft 18.

On the shaft 12 is another sprocket 19 that is -connected by a sprocket chain 20 to a sprocket 21 which may be connected by a clutch 22 to the shaft 18. The shaft 18 carries a cable drum 24. The shaft 18 rotates in bearings 25, 26 mounted on the posts 9, 10,

respectively.

On the shaft 12 is another sprocket 27 connected by a sprocket chain 28 to a s rocket 29 which may be connected by a suita le clutch 30 with the shaft 18. The sprockets described above are of such relative size as to secure different speeds for the drum 24, accordin to which of the clutches is in. The ca le drum 24 is provided at its opposite ends with brake drums 31, 32.

Surrounding the brake drums 31, 32 are brake bands 33, 34, respectively.

The construction described above is similar to that of one type of existing drawworks, though it is to be understood that the invention is not limited to the particular type illustrated and described.

In drawworks of this character, it is customary t0 mount the change-speed operating mechanism and the brake operating mechanism directly on the floor of the derrick, the various bearings being independently secured to the derrick floor and the various parts properly aligned so that said mechanisms will properly hook up with the change-speed mechanism and brakes. The mounting of these mechanisms in this manner entails the expenditure of considerable time when installing a drawworks at a well. Every time the drawworks was moved to a new well, it was necessary to separately mount and realign the various parts of the change-speed operating mechanism and brake operating .mechanism. Besides this,some of the parts were mislaid or lost, thus involving additional time in securing new parts. To overcome these objections, the change-speed operating mechanism and brake operating mechanism are mounted on a plate so as to constitute a unit that can be readily attached to and detached from the drawworks frame.

This unit is constructed as follows I There is provided a plate 35 provided at its .opposite ends with rearwardly extending arms 36, 37. The arms 36, 37 terminate in upright flanges 38 provided with holes 39 for bolts 40, one of said bolts passing through the post 9 and the other through the post 10. Other bolts 401 pass through the floor 402 of the derrick to aid in anchoring said plate. Two of the bolts 401 pass through rearwardly extending arms 403 of the plate 35.

Secured to the upper face of the plate 35 are bearings 41 for a rock shaft 42 which extends transversely of said plate, one of the bearings 41 being mounted on the arm 37. Surrounding the shaft 42 is a tubular shaft 43 and surrounding the shaft 43 is a tubular shaft 44. The shaft 42 is provided with an operating foot lever 45 and with an arm 46; the .shaft 43 is provided with a foot lever 47 and with an arm 48; and the shaft 44 is provided with a foot lever 49 and an arm 50. The shaft 42 projects at both ends beyond the shafts 43, 44, and the shaft 43 projects at both ends beyond the shaft 44. Pivoted at 51, 52,

53 to the arms 50, 46, 48, res ctively, are rods 54, 55, 56, and each of sai rods is provided with .a shoulder 57 to enga one end of a coil spring 58, one on each The other ends of the springs 58 rest against an abutment 59 formed by an upright flange on one edge of the arm 37 of the plate. The rods 54, 55, 56 slide through guide holes 591 in the flange 59.

- Pivoted at 60 to the rod 54 is a lever 61 which is pivoted at 62 on the upper face of the plate so as to move in a plane parallel with said plate. Pivoted at 63 to the lever 61 is a rod 64 which is ivoted at 65 to a shifting fork'66. The shi ting fork 66 is pivoted at 67 on a bracket 68 secured to the post 8. The shifting fork engages one member of the clutch 30 to operate said clutch.

The rod 56 is pivoted at 69 to a shifting fork 70 which is pivoted at 71 to a bracket 72 secured to the post 9. The shifting fork 70 0 rates one member of the clutch 17.

T e rod 55 is pivoted at 73 to a shifting fork 74 which is pivoted at 75 to a bracket 76 secured to the post 10. The shifting fork 74 operates one member of the clutch 22.

To en ge the clutches 17, 22, 30, the driller Wlll actuate the foot levers 47, 45, 49 respectively, against the expansive force of the springs 58, which springs function, when the driller releases the foot levers, to disengage the clutches and to hold said clutches disengaged.

Secured to the upper face of the late 3 are bearings 77 on which is mounte a rock shaft 7 8 that extends lengthwise of the plate 35. The shaft 78 is provlded with a pair of ears 79 in which is mounted a pin 80 that passes through an eye 81 formed by one end of the brake band 33. Surrounding the shaft 78 is a tubular shaft 781 provided with a pair of ears 82 in which is a pin 83 that extends through an eye 84 formed by one end of the brake band 34.

The other end of each of the brake bands forms spaced eyes 85 through which extends a pin 86. Engaging each pin 86' between each set of eyes is a threaded rod 87. The rods 87 pass through sills 88 and are provided above said sills with nuts 89, which are held against upward movement by shoulders 90 on the sills 88. Pivoted at 91 to the sills are jaws 92 which engage the nuts 90 to lock sg 'd nuts against turning. The sha ts-7 8, 781 are provided, respectively, with segmental gears 93, 94, the teeth of which mesh with the teeth of a pinion 95 rotatably -mounted on an operating arm 96 which turns on the shaft 781. The gears 93, 94, pinion 95 and the shafts 78, 7 81, together constitute one form of pressure equalizing 'mechanism for equalizing the pressure of the brake bands when the operating member is moved into position to apply the brake bands tothe brake drums.

A bolt 97 projects through one end of the and directly at 65a to the bearings '77 and through the plate and another .bolt 98 projects through the other end of each of the bearings 77 and through the plate. The bolts 97, being relatively short, secure the bearings 7 7 to the plate 35, and the longer bolts 98, not only aid in securing the bearings 77 but also aid in securingkthe platef35 to the floor 402 of the derric The function of the plate arms or extensions 403 is to anchor the lower ends of the cables 99 that hold the brake bands 33, 34 concentric with the brake drums. Each of these cables is connected at its upper ends to a cross member 100 by a hook 101 and a turnbuckle 102. The connection or anchor at the lower end of each cable comprises a clevis 103, bolted at 104 to one of the arms a hook 105 engaging the cable, and a turnbuckle 106 adjustably connecting the hook 105 and clevis 103.

From the foregoing it will derstood that the plate 35, with the parts associated therewith, may be attached to the frame of the drawworks, either prior to installation of the drawworks on the floor of the derrick or after the frame of the drawworks has been lowered onto said floor and that, in either event, the elements of the brake operating mechanism and of the change-speed operating mechanism are properly aligned so that a minimum amount of time is required in installing the drawworks and placing it in condition for operation.

Now, referring to Figs. 7 and 8 of the drawings, illustrating a modification of the invention, the elements that functionally correspond with those hereinbefore described are indicated by the same reference characters with the addition of the. suiiix a. In this instance. the rod 54ais pivoted fork 66a, thus omitting members corresponding to the lever 61 and rod 64.

laralleling the shaft 78a is a rock shaft 107 which is mounted in bearings 108 bolted, or otherwise suitably secured, at 109 to the plate 35a. The shaft 107 is positioned for,- ward of the shaft 780 and it is provided near its left end with afoot lever 110 and near its right end with an arm 111 which pivotally engages a rod 112 that extends rearwardly at substantially a right angle to the shaft 107. The rod 112 is endwise shiftable in a guide 113 secured to the plate 35a, and between said guide and a shoulder 114 on the rod 112 is a coil spring 115 that surrounds the rod 112 and that yield ngly urges the rod 112 rearwardly.

The rod 112 is pivoted at- 116 to an arm 117 on a vertical rock shaft 118 which connects with a shifting fork 119 that throws a clutch member 120 in and out of engagement with a clutch member121. The clutch memtary table,

be readily 1111- her 120 is slida-bly mounted in the customary manner on the shaft 12a and the clutch member 121 is secured to a sprocket 122 that drives a rotary table, not shown, through a sprocket. chain, not shown. The clutch 120, 121 thus controls the operation of the rotary table and said clutch is commonly referred to as the rotary clutc It will now be readily understood that, when the driller desires to operate the rohe will depress the foot lever 110. This form of the invention otherwise operates the same as has been 'hereinbefore described in connection with Figs. 1 to 5.

By also mounting the shaft 107 and rod 112 of the rotary clutch o crating mechanism on the plate 35a, the-pre erable'operation of the'rotary clutch by the foot of the operator is attained without the necessity of assembling the shaft 107, bearing 108 and rod 112 upon the floor of the derrick at the time of installation of therotary drawworks at the location where it is to function.

I claim:

1. A control of the character described comprising thecombination with a derrick floor and a drawworks having a brake drum and a band therefor and a frame, of a unitary plate adapted for overlying the derrick floor and for connection with said frame, brake band operating mechanism mounted on said plate and adapted for connection with one end of the brake band, and a means mounted on the plate to anchor the other end of the brake band to said plate independently of said mechanism.

2. A control of the character described comprising the combination with a derrick floor and a drawworks havin a brake drum and a band therefor and-a with uprights, of a unitary plate to overlie the derrick floor provided with upright flanges, a means to secure each of the flanges to the uprights of the frame, brake band operating mechanism mounted on said plate and adapted for connection with oneend of the brake band, and a means mounted on the plate to anchor, the other end of the brake band to said plate independently of said mechanism.

3. vA control of the character described comprising the combination with a derrick floor and a drawworks having a frame and having a, change-speed mechanism including clutch-shifting members, of a unitary plate adapted for overlying the derrick floor and for connection with said frame, and change-speed operating mechanism mounted on said plate and adapted for connection with the clutch-shifting members of the drawworks.

4, A control of the character described comprising the combination with a drawworks having a brake drum and a band therefor and a frame, of a pl te adapted for connection rame provided floor of a derrick.

v shaft mounted in the bearings, a means operable by the shaft adapted for connection with one end of the brake band, a means mounted on the plate to anchor the other end of the brake band to said plate, and bolts passing through the bearings and through the plate, at least one of the bolts of each bearing eing secured to the plate and others of said bolts being of greater length for securing to the 5. A control of the character described comprising the combination with a derrick floor and a drawworks having a frame and having a change-speed mechanism including clutches,

of a unitary plate adapted for overlying the derrick floor and for connection with said frame, a bracket secured to the frame, a clutch operating member pivoted to the bracket, change-speed operating mechanism mounted on the plate, and a means detachably connecting said mechanism to the clutchoperating member.

6. A control of the character described comprising a plate provided with an abutment,

earings secured to the plate, a shaft mounted in said bearings, a hollow shaft mounted on the first shaft, operating members secured to the shafts, arms projecting from the shafts, rods connected with the arms and passing through the abutment and provided with shoulders, coil springs on the rods between the shoulders and the abutment, means for releasably connecting each of the rods to a clutch-operating member, and a means to detachably secure the plate to the frame of a drawworks.

7. A control of the character described comprising a plate provided with an abutment,

an arm on the vertical shaft pivoted to the other end of the rod, a shoulder on the rod, a, spring on the rod between the shoulder and the bracket, and a shifting fork for the clutch connected with the vertical shaft.

Signed at Grafton, Pennsylvania, this 20th day of March, 1929.

JOHN D. SPALDING.

bearings secured to the plate, a shaft mounted in said bearings, a hollow shaft mounted on the first shaft, a second hollow shaft mounted on the first mentioned hollow shaft, operating levers secured to the respective shafts, arms projecting from the respective shafts, rods connected to the arms and passing through I the abutment and provided with shoulders, coil springs on the rods between the shoulders and the abutment, means for releasably connecting each of the rods to a clutch operating member, and a meansto detachably secure the plate to the frame of a drawworks.

8. A control of the character described comprising the combination with a derrick floor and a drawworks having a frame and having a line shaft rotatably mounted on the frame, of a unitary plate adapted for overlying-the derrick floor and for connection with said frame, a sprocket fixed to the line shaft, a clutch to releasably connect the shaft to the sprocket, a rock shaft mounted on the plate, a foot lever on the rock shaft, and means operably connecting the rock shaft with the clutch.

9. A control of the character described comprising the combination with a drawworks 

